Wall sconce



FIG. 1 is a perspective view of a wall sconce comprising the new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, a left side elevational view being a mirror image thereof; and,

FIG. 4 is bottom view thereof.

The broken lines in the figures are for illustration purposes only and form no part of the claimed invention. 

The ornamental design for a wall sconce, as shown and described. 